Click on a day for an hourly weather forecast
The temperatures in Somerset in September are usually low and can range between 11°C and 18°C.
You can expect about 3 to 8 days of rain in Somerset during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Somerset in September 2025.
If you’re planning to visit Somerset in the near future, we highly recommend that you review the 14 day weather forecast for Somerset before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 2° | 8 | 20 | 3 | 58 mm | Awful | Somerset in January |
| February | 8° / 3° | 8 | 17 | 4 | 58 mm | Awful | Somerset in February |
| March | 10° / 3° | 6 | 23 | 2 | 49 mm | Bad | Somerset in March |
| April | 13° / 4° | 4 | 25 | 1 | 41 mm | Ok | Somerset in April |
| May | 15° / 7° | 4 | 27 | 0 | 56 mm | Good | Somerset in May |
| June | 18° / 10° | 5 | 25 | 0 | 63 mm | Good | Somerset in June |
| July | 20° / 13° | 5 | 26 | 0 | 65 mm | Good | Somerset in July |
| August | 20° / 13° | 6 | 25 | 0 | 70 mm | Good | Somerset in August |
| September | 18° / 11° | 4 | 26 | 0 | 43 mm | Good | Somerset in September |
| October | 14° / 9° | 6 | 25 | 0 | 76 mm | Good | Somerset in October |
| November | 10° / 6° | 7 | 23 | 1 | 73 mm | Bad | Somerset in November |
| December | 8° / 4° | 7 | 22 | 2 | 73 mm | Awful | Somerset in December |